Best tool in my box for sorting out messes I've mentioned before:
The UK GRO website for post 1837 UK births that morphs into FreeBMD around 1911 for confirming mothers' maiden names. It can be tedious but helps disambiguation.
I've only been using it about 12 months so a slow process to verify the wilder branches.
#FindMyPast has added to its collection of school registers. This morning I've dipped into the beginnings of Bearwood Road school, Smethwick. The trials and tribulations and the first inspector's report.
I wonder if any of my #Mathstodon acquaintances know of or have thought about the strategy of defections looked at a bit like "The Prisoner's Dilemma".
I suspect the biggest impact will be to destabilise relationships between those who are staying loyal to their party ... whether the uber loyalists are just pretending ...